Credit Risk and Fair Value of Financial Instruments Level 3 (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair Value, Measurement Inputs, Disclosure [Table Text Block]

The fair value of our debt instruments at December 31 was as follows:

	2014		2013
	(In thousands)
3.125% Senior Convertible Notes due July 2014	—		106,939
6.75% Senior Notes due April 2015	—		144,653
6.75% Senior Notes due April 2016	208,075		214,904
3.125% Senior Convertible Notes due July 2016	160		60,487
7.0% Senior Notes due June 2017	320,043		333,259
7.625% Senior Notes due October 2018	277,538		288,875
6.5% Senior Notes due April 2019	—		210,000
7.0% Senior Notes due May 2019	—		270,000
4.5% Senior Notes due November 2020	201,700		192,610
8.0% Senior Notes due November 2021	174,375		173,625
5.375% Senior Notes due January 2022	437,750		431,588
5.375% Senior Notes due May 2024	558,250		—
7.5% Senior Notes due April 2027	220,890		215,750
Term Loan due July 2018	370,000		600,000
Bank credit facility due July 2018	235,000		30,000
Mortgage notes and other debt, maturities through 2047	4,117		4,752
Total fair value of debt instruments	$	3,007,898	$	3,277,442